EVA and Hypalon are 2 different materials. Hypalon is used primarily on teh West Coast, is very durable, gives a little when squeezed (I say it feels spongy), and is noticeably heavier than EVA. I believe Loomis uses hypalon on many of their Saltwater rods.
EVA is harder than Hypalon, much lighter, and comes in different grades. I personally do not like Mooseskin, as it is not very dense, and does not feel very durable to me. Customgrip, which is sold by Clemens, is very hard and dense, and I find it easy to install. The other EVA I used and liked is from Pac Bay. Not quite as firm or dense as Customgrip, but it is a good alternative. Anglers Workshop sells it as Sof-Touch.